Need to resolve the Error in my Query

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SQL

SQL-Server-2014

USE [MABBSolutions]
GO
/****** Object:  Trigger [dbo].[trgAfterUpdate]    Script Date: 5/27/2015 1:32:22 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- Batch submitted through debugger: SQLQuery3.sql|7|0|C:\Users\ZingSoft\AppData\Local\Temp\~vs242B.sql

ALTER TRIGGER [dbo].[trgAfterUpdate] ON [dbo].[FourLevel]
FOR UPDATE
AS
 
SET NOCOUNT ON
 
IF(UPDATE(OpeningBalanceDebit) OR UPDATE(OpeningBalanceCredit))
BEGIN
 
DECLARE @CurrentDr decimal(26,2);
DECLARE @CurrentCr decimal(26,2);
 

DECLARE @AccountCode nvarchar(12);
 
DECLARE @OpeningDebit decimal(26,2);
DECLARE @OpeningCredit decimal(26,2);
 

SELECT @AccountCode = i.AccountCodes FROM inserted i;
 
SELECT @OpeningDebit = i.OpeningBalanceDebit FROM inserted i;
SELECT @OpeningCredit = i.OpeningBalanceCredit FROM inserted i;
 

 
SELECT @CurrentDr = CurrentBalanceDebit FROM [dbo].[FourLevel] WHERE AccountCodes = @AccountCode;
SELECT @CurrentCr = CurrentBalanceCredit FROM [dbo].[FourLevel] WHERE AccountCodes = @AccountCode;
 
IF (@OpeningDebit != 0)
BEGIN	
	IF(@CurrentDr != 0)
	BEGIN
		SET @OpeningDebit = @CurrentDr + @OpeningDebit;
		UPDATE [dbo].[FourLevel] SET CurrentBalanceDebit = @OpeningDebit, CurrentBalanceCredit = 0 WHERE AccountCodes = @AccountCode;
		
	END
	ELSE
	BEGIN
		IF (@CurrentCr >= @OpeningDebit)
		BEGIN
			SET @CurrentCr = @CurrentCr - @OpeningDebit;
			UPDATE [dbo].[FourLevel] SET CurrentBalanceDebit = 0, CurrentBalanceCredit = @CurrentCr WHERE AccountCodes = @AccountCode;			
		END
		ELSE
		BEGIN
			SET @CurrentDr = @OpeningDebit - @CurrentCr;
			UPDATE [dbo].[FourLevel] SET CurrentBalanceDebit = @CurrentDr, CurrentBalanceCredit = 0 WHERE AccountCodes = @AccountCode;
		END
	END
END
IF (@OpeningCredit != 0)
BEGIN
	IF (@CurrentCr != 0)
	BEGIN
		SET @CurrentCr = @CurrentCr + @OpeningCredit;
		UPDATE [dbo].[FourLevel] SET CurrentBalanceDebit = 0, CurrentBalanceCredit = @CurrentCr WHERE AccountCodes = @AccountCode;
	END
	ELSE
	BEGIN
		IF(@CurrentDr >= @OpeningCredit)
		BEGIN
			SET @CurrentDr = @CurrentDr - @OpeningCredit;
			UPDATE [dbo].[FourLevel] SET CurrentBalanceDebit = @CurrentDr, CurrentBalanceCredit = 0 WHERE AccountCodes = @AccountCode;
		END
		ELSE
		BEGIN
			SET @CurrentCr = @OpeningCredit - @CurrentDr;
			UPDATE [dbo].[FourLevel] SET CurrentBalanceDebit = 0, CurrentBalanceCredit = @CurrentCr WHERE AccountCodes = @AccountCode;
		END
	END
END
END

Every time i debug this code it insert comment "the underlined line above" can any one help me where the problem is.
when i execute the trigger it works fine and also works fine in real time.